• DUDU OS

  • CAN-Bus messages: Can I define own (local) rules or re-use existing messages?

My car has several old-fashioned "alert-lights" like e.g. "AIRBAG" - "ENGINE" - etc. This is simply an array of several 12V lightbulbs behind a rather huge panel - and this is exactly the panel I would like to use for a Dudu7. Ideally, I would

  • recognize the 12V current in a small Arduino board (nothing new for me, this is quite normal in home automation), so if the airbag-lightbulb gets 12V, the Arduino knows "airbag=true"
  • use something like an MCP2515 to send the signal to CAN-Bus, so the Dudu would get the CAN-Bus message I define.

Of course the Dudu does not know my CAN-Bus messages because I define them in my Arduino. Right now I see two options and would like to ask which is possible:
A) In my Dudu7 I would define own rules like "If you receive the message "AirbagAlertRed" through CAN bus, please display "AirbagRed.png" as overlay" and then I would tell my Arduino to send "AirbagAlertRed" once it gets current on the airbag-pins
B) I get an overview of the exact CAN Bus messages for my car that makes the overlay happen. So it would be "ok, the airbag symbol is shown once Dudu gets the message "VW-Airbag-Code-12345" on CAN bus" and then of course I would tell my Arduino to send "VW-Airbag-Code-12345" once it gets current on the airbag-pins

Which of those two options is possible/recommended?

    SkodaSuperb2012 второй вариант.
    Вам нужно изучить коды каншины от VW. И отсылать в канбокс из ардуино необходимые коды по шине кан.

      Yes, I would be absolutely happy with just a list of codes I could use. So just to clarify my question in case it was not clear: I am not asking about "somebody should create custom codes for me" - I would do all that myself, the only thing I would need is a list of original codes and what they cause: So what is a real CAN-Bus code that makes Dudu display "Airbag" or "Engine" just as it displays a door opening when it gets the message, that a door is opened? Where could I find the original CAN-Bus codes I could try?

        SkodaSuperb2012
        As far as I know, Dudu7 can record Canbus logs. I can try to create such a log in the next few days on a VW Touran 1T3 (Raise Canbox) with distance sensor, door, reverse, etc.
        You can also find Canbus protocols from VAG vehicles on Github.

          Bettman66
          Many thanks I will try the commands from there.

          The method "let's just record it" was my first one - however there is no way to record an airbag failure without having one 🙂